Singularity: A Sarah Armstrong Mystery, Book 1

Profiler Sarah Armstrong knows what it's like to be in a sticky situation. As a single mother and one of the few female Rangers in Texas history, she has had to work twice as hard to rank among the best cops in the Lone Star State. But when mega-wealthy businessman Edward Lucas III is found murdered along with his mistress, their bodies posed in grotesque ways, Sara quickly senses that this will be the deadliest case of her career. While others focus the investigation on Lucas's estranged wife, Sarah disagrees.

Blood Lines: Sarah Armstrong Mystery #2

Listeners loved Sarah Armstrong, the feisty and vulnerable profiler in Kathryn Casey's first mystery, Singularity. She's back in this second book in the series with her hands full with two cases at once: A persistent and potentially lethal stalker pursues pop mega-star Cassidy Collins, and a high-energy Houston businesswoman is found dead in her house. Though the businesswoman's death is being called a suicide, when Sarah is shown photographs of the scene, something seems off.

The Killing Storm: A Sarah Armstrong Mystery, Book 3

On a quiet afternoon in the park, four-year-old Joey plays in the sandbox, when a stranger approaches looking for his puppy. While Joey's mom, Crystal, talks on her cell phone, the stranger convinces the child to help search. By the time Crystal turns around, her son has disappeared. Yet her reaction is odd, not what one would expect from a distraught mother. Is Crystal somehow involved in her son's abduction?